Are there options for donor-derived i.m. anti-D IgG preparations other than to prevent Rh(D) sensitization? The intravenous route.
Author(s): Rewald E
Affiliation(s): Fundacion Hematologica, Corrientes, Argentina.
Publication date & source: 1995-12, Transfus Sci., 16(4):383-9.
Publication type: Review
The use of i.v. anti-Rh(D) IgG for conditions other than prevention of Rh(D) sensitization is discussed. Besides highlighting the platelet response in ATP, a putative distinctive effect on the hemorrhagic threshold is suggested. Accordingly, we have included discussion of cases of aplastic anemia, myelodysplasia, heavy chemotherapy, coagulation deficiency, and senile vascular atrophy. We have also considered attempts to replace the high-dose pooled i.v. IgG (IVIG) with the much smaller amounts of IgG present in anti-Rh(D) preparations used to prevent Rh-sensitization in pregnancy. Both Fc and variable fragments of the IgG molecule may play a role, the former potentiated by manufacture-induced IgG aggregation and the latter by donor hypersensitization. A role for IgG-anti-F(ab')2 molecules cannot be ruled out.